Section-insulator for electric lines.



H. P. HOXIE. SECTION INSULATOR FOR ELECTRIC LINES. APPLICATION rum)nno.e,19o7.

946,546o Patented Jan. 18, 1910.

2 SHEETS-SHEET l.

INVENTOR ATTORNEY H. F. HOXIE.

SBUTION INSULATOR FOR ELECTRIC LINES.

' APPLICATION FILED DBO. 6,1907. 946,546

Patented Jan. 18,1910.

' 2 SHEETS-SHEET 2.

AT'TORNEY UNITED sans 1 OFFICE.

HALL F. HOXIE, OF BROOKLYN, NEW/V YORK, ASSIGNOR, BY MESNE ASSIGNMENTS,T0 WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, OF EAST PITTSBURG,PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

SECTION-INSULATOR FOR ELECTRIC LINES.

Application filed December 6, 1907.

T 0 all whom it may concern:

Be it known that I, HALL F. Home, a citizen of the United States, and aresident of Brooklyn, in the county of Kings and State of New York, haveinvented a new and useful Improvement in Section-Insulators for ElectricLines, of which the following is a specification.

My invention relates to electric lines, and particularly to electricrailway trolley lines, and it has for its object to provide a sectioninsulator for such lines that shall be simple and durable and adaptedfor use in connection with relatively high voltage distribution and highspeed sliding or bow trolleys.

In trolley line construction it is usually desirable to divide the lineinto a series of sections which are insulated from each other and whichmay or may not be connected through suitable switching devices, by ashunt circuit. lVhen an arrangement of this kind is employed, a sectionbreak insulator must be provided which is capable of withstanding themechanical tension on the line and which is also capable of resistingthe electrical strains imposed by the voltage of the line. In the priorart, rods or bars of wood or other insulating material have usually beenemployed to fill in the gap formed at a section break, but, witharrangements of this kind, the depreciation is usually excessive byreason of the flashing and burning which occurs when the trolley becomesdisengaged from the supply conductor.

According to one embodiment of my present invention, I avoid theaforesaid difiiculties by providing an actual mechanical as well as anelectrical break in the supply line conductor and guide rails on eitherside of the break, at a material distance from the conductor, forguiding the sliding or bow trolley over the gap.

In another arrangement of my invention, which is adapted for use withwheel trolleys, I fill in the gap between the adjacent ends of theinterrupted conductor by a strip of insulating material, such asporcelain, which is capable of resisting the action of heat but which isunable to sustain large forces in tension, improved means being providedfor relieving the insulating strip from substan- Specification ofLetters Patent.

. and adapted for use with sliding or bow Patented Jan. 18, 1910.

Serial No. 405,410.

tially all the mechanical strains which would ordinarily be imposed uponit.

Figures 1 and 2 of the accompanying drawings are, respectively, side andend elevations of a section break insulator constructed in accordancewith my invention trolleys. Figs. 3 and a are similar views of a sectioninsulator adapted for wheel trolleys, both forms being intendedprimarily for use with well known forms of cateuary line construction.

Referring first to Figs. 1 and 2, the device here illustrated comprisesa pair of insulating spools or sleeves 1 and 2, mounted on bolts or rods3 and 4, strain rods 5 and 6, guide bars 7 and 8 and a plurality ofsupporting brackets 9, 10, 11, and 12. The bolts 3 and 4, on which theinsulating spools 1 and 2 are mounted, are tied together atcorresponding ends by the strain rods 5 and 6 and the frame thus formedis supported by the interrupted messenger or supporting cable 1 theadjacent ends of which are tied to the insulating spools 1 and 2. Thetrolley conductors 15 and 16 are supported, in the usual manner, fromthe sections of messenger cable and their adjacent ends are held rigidlyin position by the supporting brack ets 9 and 12, the upper ends ofwhich are clamped to the insulating spools 1 and 2 and the lowerextremities of which are provided with trolley clamps 17 and 18. Theextremities of the trolley conductors 15 and 16 and of the guide bars 7and 8 are bent upwardly in order that the sliding or bow trolley maypass smoothly across the break The guide bars 7 and 8 are supported bythe U- shaped brackets 10 and ll which are secured to the lowerextremities of the bolts 3 and 1 and hold the guide bars at a materialdistance apart in the horizontal plane of the interrupted trolleyconductor and parallel to it. By this means an ample air space isprovided for the insulation of high trolley line voltages withoutimpeding the progress of an electric vehicle as its trolley passes overthe section break insulator.

Reference may now be had to Figs. 3 and 1, in which corresponding partsare designated by the same reference characters. In the arrangement hereillustrated, the guide bars 7 and 8 and their supporting brackets diatepoint in its length by a clamp 20 which i is suspended by a rod 21 fromthe strain rod 6. By this means, the ,section break is adapted for usewith wheel trolleys without 1 impairing its efficiency or shortening itslife.

The section insulator of my invention is not restricted in its use toany particular type of line construction and, furthermore. it isconceivable that various modifications in its structure may be effectedwithout departing from the spirit of the invention. 1, therefore. desirethat only such limitations shall be imposed as are indicated in theappended claims.

I claim as my invention 1. In an electric line structure. thecombination with an interrupted line conductor, a pair of verticallydisposed insulators, supporting means therefor, and pair of strain rodsconnecting corresponding ends of the insulators together, of bracketarms projecting downwardly from the insulators and respectively attachedto the ends of the intcrrupted line conductor.

l 2. In an electric hne structure, the comb1- nation with an interruptedline conductor, a pair of insulating sleeves materially separated fromeach other and joined by strain rods, and means for supporting theinsulating frame thus formed, of brackets that connect the ends of theinterrupted line to the insulators. and means for guiding a trolleyacross the break in the line conductor.

3. In an electric line structure, the combination with an interruptedline conductor, a pair of insulating sleeves, bolts or rods on which thesleeves are mounted, tension rods connecting corresponding ends of thebolts. and means for supporting the frame formed by the rods and thebolts, of means for securing the adacent ends of the interrupted lineconductor to the insulating sleeves, and means for guiding a trolleyacross the break in the conductor.

4. In an electric line structure, the combination with an interruptedmessenger or supporting cable. an interrupted line conductor supportedtherefrom, a pair of insulating sleeves to which the adjacent ends ofthe messenger wire are attached, strain rods joining the insulators, andmeans for supporting the adjacent ends of the interrupted line conductorfrom the insulators, of means for guiding the trolley across the breakin the line conductor.

5. In an electric line structure, the combi l l l l 1 nation with aninterrupted line conductor, a pair of insulating sleeves materiallyseparated from each other and joined by strain rods, and means forsupporting the insulating frame, of brackets that connect the ends ofthe interrupted line to the insulators, and guide bars parallel to theline conductor and materially separated from it for guiding the trolleyover the break.

6. In an electric line structure, the combination with an interruptedmessenger or supporting cable, an interrupted line conductor supportedtherefrom. a pair of insulating sleeves to which the adjacent ends ofthe messenger wire are attached, strain rods joining the insulators, andmeans for supporting the adjacent ends of the interrupted line couductorfrom the insulators, and guide bars parallel to the line conductor andmaterially separated from it for guiding the trolley over the break.

'7. In an electric line structure. the combination with an interruptedline conductor and insulating means for holding the line terminals at apredetermined distance apart, of a pair of laterally spaced bars forguiding the trolley across the break in the line conductor.

8. In an electric line structure, the combination with an interruptedline conductor and insulating means for holding the line terminals at apredetermined distance apart, of a pair of laterally spaced guide barsdisposed parallel to the line conductor at the sides thereof for guidingthe trolley over the break.

9. In an electric line structure, the combination with an interruptedline conductor and insulating means comprising a pair of sleeveinsulators, supporting rods therefor and substantially parallel strainbars connecting the supporting rods for holding the line terminals at apredetermined distance apart. of independent means for guiding thetrolley across the break in the line conductor.

10. In an electric line structure, the combination with an interruptedline conductor and insulating means comprising a pair of sleeveinsulators, supporting rods therefor and substantially parallel strainbars connecting the supporting rods for holding the line terminals at apredetermined distance apart, of guide bars parallel to the lineconductor and materially separated from it for guiding the trolley overthe break.

In testimony whereof, I have hereunto subscribed my name this 19th dayof November, 1907.

HALL F. HOXIE.

lVitnesses H. C. TENDER, IVM. II. CAPEL.

